It is possible that the main title of the report Marfan Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
As Jenny points out, being able to lisp the alphabet song at age two has little to do with 'knowing' the alphabet. And, yes, most children learn the letters by sight and sound in kindergarten, although most are capable of learning this information sooner if diligently taught by parents or others.
Although not everyone agrees on exactly how those stages progress, knowing what the stages are can provide you with an idea on how children come to break the written code and learn to read. 1  Pre-alphabetic phase. 2  Partial alphabetic phase. 3  Full alphabetic phase.  Consolidated alphabetic phase.